>>40789667 (OP)
always loved the cis big brother gradually falling for the trans little sister dynamic
older brother and younger brother are best bros growing up, lots of roughhousing and boys being boys. then as his younger brother becomes a girl, has to contend with memories of his lil bro and his growing feelings for the new girl in the family.
remembering how he slapped his lil bros ass after he scored a goal at his soccer game, how he noticed his lil bro gasp and harden under his gym shorts, how he got hard from it too but told nobody...
how will this tension resolve??